Sliding part

Patent metadata

Field	Value
Publication number	US-10907684-B2
Application number	US-201816638435-A
Country	US
Kind code	B2
Filing date	Aug 24, 2018
Priority date	Aug 28, 2017
Publication date	Feb 2, 2021
Grant date	Feb 2, 2021

Abstract

In a pair of sliding parts having sliding faces S that slide with respect to each other, at least one of the sliding faces S has a one-side peripheral edge ( 4 a ) and an other-side peripheral edge ( 4 b ) and includes: fluid introduction grooves ( 12 ) each of which has one end communicating with the other-side peripheral edge ( 4 b ), dynamic pressure generation grooves ( 11 ) each of which has one end communicating with the other-side peripheral edge ( 4 b ) and the other end being surrounded by a land portion, and a release groove ( 13 ) provided in the land portion, the release groove ( 13 ) communicating with the fluid introduction grooves ( 12 ). With the sliding parts, not only a liquid such as oil but also an oil mist serving as a mixture of oil and air can be sealed as a sealed fluid, and generation of oil mist itself can be reduced.

First claim

The invention claimed is:

1. A pair of sliding parts having sliding faces that slide with respect to each other, characterized in that at least the sliding face on one side includes:
fluid introduction grooves each of which has one end communicating with an other-side peripheral edge of the sliding face;
dynamic pressure generation grooves each of which has one end communicating with the other-side peripheral edge of the sliding face and the other end being surrounded by a land portion; and
a release groove provided in the land portion, the release groove communicating with the fluid introduction grooves.

2. The sliding parts according to claim 1 , characterized in that the release groove is provided between the other ends of the dynamic pressure generation grooves and a one-side peripheral edge of the sliding face.

3. The sliding parts according to claim 2 , characterized in that the sliding face includes regions surrounded by the fluid introduction grooves and the release groove, and
the predetermined number of the dynamic pressure generation grooves are arranged in the regions.

4. The sliding parts according to claim 3 , characterized in that the regions are arranged continuously in the circumferential direction.

5. The sliding parts according to claim 3 , characterized in that the regions are arranged non-continuously in the circumferential direction.

6. The sliding parts according to claim 2 , characterized by further comprising:
a dynamic pressure generation mechanism including:
a fluid introduction portion having one end that communicates with the one-side peripheral edge of the sliding face; and
a groove portion having one end that communicates with the fluid introduction portion and a Rayleigh step mechanism in the other end.

7. The sliding parts according to claim 2 , characterized by further comprising:
a dynamic pressure generation mechanism including:
a fluid introduction portion having a pair of opening portions open at the one-side peripheral edge of the sliding face and a communication passage providing communication between the pair of opening portions; and
a groove portion having one end that communicates with the fluid introduction portion and a Rayleigh step mechanism in the other end.

8. The sliding parts according to claim 1 , characterized in that the sliding face includes regions surrounded by the fluid introduction grooves and the release groove, and
the predetermined number of the dynamic pressure generation grooves are arranged in the regions.

9. The sliding parts according to claim 8 , characterized in that the regions are arranged continuously in the circumferential direction.

10. The sliding parts according to claim 9 , characterized by further comprising:
a dynamic pressure generation mechanism including:
a fluid introduction portion having one end that communicates with the one-side peripheral edge of the sliding face; and
a groove portion having one end that communicates with the fluid introduction portion and a Rayleigh step mechanism in the other end.

11. The sliding components according to claim 9 , characterized by further comprising:
a dynamic pressure generation mechanism including:
a fluid introduction portion having a pair of opening portions open at the one-side peripheral edge of the sliding face and a communication passage providing communication between the pair of opening portions; and
a groove portion having one end that communicates with the fluid introduction portion and a Rayleigh step mechanism in the other end.

12. The sliding parts according to claim 8 , characterized in that the regions are arranged non-continuously in the circumferential direction.

13. The sliding components according to claim 12 , characterized by further comprising:
a dynamic pressure generation mechanism including:
a fluid introduction portion having one end that communicates with the one-side peripheral edge of the sliding face; and
a groove portion having one end that communicates with the fluid introduction portion and a Rayleigh step mechanism in the other end.

14. The sliding components according to claim 12 , characterized by further comprising:
a dynamic pressure generation mechanism including:
a fluid introduction portion having a pair of opening portions open at the one-side peripheral edge of the sliding face and a communication passage providing communication between the pair of opening portions; and
a groove portion having one end that communicates with the fluid introduction portion and a Rayleigh step mechanism in the other end.

15. The sliding parts according to claim 8 , characterized by further comprising:
a dynamic pressure generation mechanism including:
a fluid introduction portion having one end that communicates with the one-side peripheral edge of the sliding face; and
a groove portion having one end that communicates with the fluid introduction portion and a Rayleigh step mechanism in the other end.

16. The sliding components according to claim 8 , characterized by further comprising:
a dynamic pressure generation mechanism including:
a fluid introduction portion having a pair of opening portions open at the one-side peripheral edge of the sliding face and a communication passage providing communication between the pair of opening portions; and
a groove portion having one end that communicates with the fluid introduction portion and a Rayleigh step mechanism in the other end.

17. The sliding parts according to claim 1 , characterized by further comprising:
a dynamic pressure generation mechanism including:
a fluid introduction portion having one end that communicates with the one-side peripheral edge of the sliding face; and
a groove portion having one end that communicates with the fluid introduction portion and a Rayleigh step mechanism in the other end.

18. The sliding parts according to claim 17 , characterized in that the dynamic pressure generation mechanism is provided between the release groove and the one-side peripheral edge of the sliding face.

19. The sliding parts according to claim 1 , characterized by further comprising:
a dynamic pressure generation mechanism including:
a fluid introduction portion having a pair of opening portions open at the one-side peripheral edge of the sliding face and a communication passage providing communication between the pair of opening portions; and
a groove portion having one end that communicates with the fluid introduction portion and a Rayleigh step mechanism in the other end.

20. The sliding parts according to claim 19 , characterized in that the dynamic pressure generation mechanism is provided between the release groove and the one-side peripheral edge of the sliding face.

Assignees

• Eagle Ind Co Ltd

Inventors

• Kimura Wataru
• Tokunaga Yuichiro
• Inoue Hideyuki
• Iguchi Tetsuya
• Kasahara Hidetoshi

Classifications

• F16J15/3404

  and characterised by parts or details relating to lubrication, cooling or venting of the seal · CPC title

• F16C33/107 Primary

  Grooves for generating pressure · CPC title

• F16C33/1065 Primary

  Grooves on a bearing surface for distributing or collecting the liquid · CPC title

• F16C17/045

  with grooves in the bearing surface to generate hydrodynamic pressure, e.g. spiral groove thrust bearings · CPC title

• F16C17/026 Primary

  with helical grooves in the bearing surface to generate hydrodynamic pressure, e.g. herringbone grooves · CPC title